87 lines
2.1 KiB
Java
87 lines
2.1 KiB
Java
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.util;
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/**
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* @hide
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*/
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class FinitePool<T extends Poolable<T>> implements Pool<T> {
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/**
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* Factory used to create new pool objects
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*/
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private final PoolableManager<T> mManager;
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/**
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* Maximum number of objects in the pool
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*/
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private final int mLimit;
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/**
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* If true, mLimit is ignored
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*/
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private final boolean mInfinite;
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/**
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* Next object to acquire
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*/
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private T mRoot;
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/**
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* Number of objects in the pool
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*/
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private int mPoolCount;
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FinitePool(PoolableManager<T> manager) {
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mManager = manager;
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mLimit = 0;
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mInfinite = true;
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}
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FinitePool(PoolableManager<T> manager, int limit) {
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if (limit <= 0) throw new IllegalArgumentException("The pool limit must be > 0");
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mManager = manager;
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mLimit = limit;
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mInfinite = false;
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}
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public T acquire() {
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T element;
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if (mRoot != null) {
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element = mRoot;
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mRoot = element.getNextPoolable();
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mPoolCount--;
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} else {
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element = mManager.newInstance();
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}
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if (element != null) {
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element.setNextPoolable(null);
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mManager.onAcquired(element);
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}
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return element;
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}
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public void release(T element) {
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if (mInfinite || mPoolCount < mLimit) {
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mPoolCount++;
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element.setNextPoolable(mRoot);
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mRoot = element;
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}
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mManager.onReleased(element);
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}
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}
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